题目内容：
共用题干A Country's Standard of Living
The"standard of living" of any country means the average person's share of the goods and services the country produces.A country's standard of living,________(51),depends first and ________(52)on its capacity to produce wealth."Wealth"in this sense is not money,for we do not live on money________( 53)on things that money can buy:"goods"such as food and clothing, and"services"such as transport and entertainment.
A country's capacity to produce wealth depends upon many factors,most of_________(54) have an effect on one another. Wealth depends_________(55)a great extent upon a country's natural resources.Some regions of the world are well supplied with coal and minerals,and have fertile soil and a favorable climate;other regions possess none of them.
Next to natural resources_________(56) the ability to turn them to use.Some countries are perhaps as well-off_________(57)the USA in natural resources,but suffered for many years from civil and external wars,and________(58)this and other reasons were________(59)to develop their resources.Sound and stable political conditions,and________(60)from foreign invasions, enable a country to develop its natural resources peacefully and steadily,and to produce more wealth than another country equally well favoured by nature but less well ordered.
A country's standard of living does not only depend upon the wealth that is produced and consumed_________(61)its own borders,but also upon what is directly produced through international trade.________(62),Britain's wealth in foodstuffs and other agricultural products would be much less if she had to depend only on________(63)grown at home.Trade makes it possible for her surplus manufactured goods to be traded abroad for the agricultural products that would________(64)be lacking.A country's wealth is,therefore,much influenced by its manufacturing capacity, ______(65)that other countries can be found ready to accept its manufactures.
_________(61)
A:at
B:by
C:within
D:on
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